<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>cache </title>
</head>

<body>
    <button id="btn">send</button>
    <script>
        const btn = document.getElementById('btn');
        btn.addEventListener('click', function () {
            fetch('http://localhost:3002/api3')
        })
    </script>
</body>

</html>